CN1857030B - Method for driving surround sound system and wireless subwoofer loudspeaker - Google Patents
Method for driving surround sound system and wireless subwoofer loudspeaker Download PDFInfo
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- CN1857030B CN1857030B CN200480027259XA CN200480027259A CN1857030B CN 1857030 B CN1857030 B CN 1857030B CN 200480027259X A CN200480027259X A CN 200480027259XA CN 200480027259 A CN200480027259 A CN 200480027259A CN 1857030 B CN1857030 B CN 1857030B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/07—Applications of wireless loudspeakers or wireless microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
Abstract
The present invention relates to wireless digital transmission of low frequency effects and surround channels for surround sound system. A subwoofer (72) is equipped with a wireless receiver (80) to receive signals containing information for a Low Frequency Effects (LFE) channel and information for both surround channels. In one form, the LFE is added to one or both surround channels to provide a stereo surround signal (containing both surround channels including a multiplexed LFE channel). The subwoofer (72) utilizes the LFE channel, powers surround speakers (74, 76), and passes the surround signals to respective surround speakers. A receiver (66) multiplexes LFE signals into either one or both surround sound audio channels. A digital RF transmitter (70) of the receiver transmits the combined subwoofer/surround channels to the wireless receiver (80) of the subwoofer. The remote subwoofer is connected to a power source (78). The surround speakers (74, 76) are connected to the subwoofer so as to receive the surround channels and be powered thereby.
Description
That the non-temporary patent application of this U.S. requires to obtain is that on September 24th, 2003 submitted to, exercise question is that " the low-cost wireless Digital Transmission that is used for the LFE and the surround channel of home theater ", serial number are 60/505, the rights and interests of 502 U.S. Provisional Patent Application and/or priority specifically are combined in this with its full content by reference.
Background technology
1, technical field
The present invention relates to the apparatus and method of transmit audio information, be specifically related in household audio and video system, voice data is wirelessly transmitted to the apparatus and method of one or more loud speakers.
2, background information
Fig. 1 describes the home theater of usual or traditional prior art or the block diagram of surround-sound system (generally representing with 10).Traditional home theater or surround-sound system 10 comprise the home theater system 12 as its critical piece.Right speaker 14, left speaker 16 and center loudspeaker 18 by lead by physical connection to receiver 12.Can operate receiver 12 offers right channel audio signal right speaker 14, left channel audio signal is offered left speaker 16 and the center channel audio signal is offered center loudspeaker 18 with this.
Right side circulating loudspeaker 20, left side circulating loudspeaker 22 and super woofer 24 also by lead by physical connection to receiver 12.Can operate receiver 12 offers right surround audio signal right side circulating loudspeaker 20, left surround audio signal is offered left side circulating loudspeaker 22 and super low sound signal is offered super woofer 24 with this.Because all loud speakers need be by physical connection to receiver 12, therefore so obviously home theater or surround-sound system are simple and easy and/or efficiently face many challenges aspect the installation.Similarly, because obstacle is installed, many consumers may abandon buying household audio and video system.
Because the surround sound loud speaker is placed in the place far away apart from receiver, the consumer that many expectations obtain household audio and video system (system as described in Figure 1) has run into difficulty in lead connection circulating loudspeaker.Such difficulty may be caused by some reasons, but normally causes because of aesthetic aspect and logical problem.For this reason, many consumers have very reluctantly abandoned connecting their circulating loudspeaker, and the result causes not good enough home theater sound performance and consumer's the psychology of defeating.
In view of the foregoing, various wireless surround sound solutions had once been developed.Most of wireless around solution utilization " analogue audio frequency of RF scope " solution, though simple and easy and can obtain cost benefit, this solution has caused bad tonequality.Because the purpose of home theater and surround-sound system is in order to have the sound of high-quality, this bad tonequality makes the purpose of this purchase fail to reach.This point is the prerequisite that causes utilizing digital technology rather than analogue technique.Yet,, realize that these solutions will be very expensive if use digital technology.In addition, unless wireless surround sound loud speaker by battery-operated, otherwise, for to surround sound loud speaker power supply, between home theater system and surround sound loud speaker, still need lead.Owing to conspicuous reason, utilizing battery-operated surround sound loud speaker is not an acceptable solution.
For example, if the surround sound loud speaker comprises wireless receiver and wireless signal amplifier, then the surround sound loud speaker still needs power supply to drive receiver and amplifier.In addition, if the surround sound loud speaker does not comprise wireless receiver and amplifier, then need the surround sound loud speaker is connected to outside receiver/amplifier, and described outside receiver/amplifier still needs independently power supply in addition.
Therefore, even the wireless system of this prior art is better than traditional household audio and video system slightly, but the wireless system of prior art exists the installation obstacle.
Therefore, according to top discussion, what obviously need is to alleviate the surround sound loud speaker solution that obstacle is installed.
Therefore, according to top discussion, what also obviously need is the wireless surround sound loud speaker solution that can alleviate the shortcoming of prior art.
Therefore, according to top discussion, what equally obviously need is the wireless surround sound loud speaker solution that digital tonequality can be provided.
By use the invention of shown and/or as described herein theme and/or as be included in principle in one or more multi-form and/or structures, can realize that these need and other needs.
Summary of the invention
According to the principle of this theme invention, super woofer has been installed wireless receiver and has been used for receiving the signal that comprises low-frequency effect (LFE) channel information and double surround track information.Super woofer utilizes the LFE channel information, passes to corresponding circulating loudspeaker for the circulating loudspeaker power supply and with the surround channel information signal.So, super woofer can be placed into, for example be placed into the rear portion, room of surround-sound system apart from the surround-sound system receiver position far away relatively.Like this, circulating loudspeaker does not need independently power line, though circulating loudspeaker is away from the surround-sound system receiver and be not coupled with the surround-sound system receiver.
According to an embodiment, when being transferred into super woofer, the LFE sound channel signal also digitally is multiplexed to list or double surround track.The signal that the super woofer demultiplexing receives is separated the LFE sound channel signal with this from the surround channel signal.In a realization of the present invention or form, before signal is transferred into super woofer, utilize 8-14 position modulation (EFM) that multiplexed conversion of signals is become Red Data Book CD (Red Book CD) form.
Except being multiplexed into the LFE sound channel signal of list or double surround track, the bass frequencies audio component also can be multiplexed into list or double surround track.
According to another embodiment, by the surround-sound system receiver, the LFE sound channel signal is added to list or double surround track with analog format at first.Signal is added and is converted into the pulse code modulation (pcm) form.Utilize EFM that the PCM format signal is encoded into Red Data Book CD form and is sent to super woofer by RF (radio frequency) carrier wave then.Be positioned near the inner or RF receiver of super woofer demodulation RF EFM signal then, and the PCM conversion of signals is become analogue audio frequency.
Utilize simple low pass filter can from list or double surround track, extract the LFE sound channel, and the LFE sound channel can be amplified by super woofer.If LFE extracts from dual track, then should utilize summing amplifier to make two LFE signal reorganization.So the audio signal of Sheng Chenging is amplified by super woofer thus.
In one form, the theme invention provides the wireless super woofer that is used for surround-sound system.Wireless super woofer comprises receiver and extractor, and receiver is used for that wireless receiving comprises subwoofer and around the signal of component, extractor is used for extracting the subwoofer component from the signal that receives and drives super woofer with this.Super woofer also provides the suitable right side and a left side to drive circulating loudspeaker around component with this with the left side circulating loudspeaker respectively to the right.
In another form, the theme invention provides the surround sound receiver.The surround sound receiver comprises first port, second port that is used to be connected to the second preposition loud speaker that are used to be connected to the first preposition loud speaker, be used to make up from the combiner of the signal of subwoofer and surround channel and be used for the wireless reflector that is sent to super woofer of composite signal.Super woofer wireless receiving composite signal, from composite signal, extract the subwoofer sound channel, the signal that comprises surround channel is provided for the circulating loudspeaker power supply and to circulating loudspeaker.Surround sound receiver preferably (but not necessarily) also comprises the 3rd port that is used to connect center loudspeaker.
In another form, the theme invention provides a kind of driving to have the method for the surround sound subsystem of super woofer and surround sound loud speaker.This method comprises the following step: (a) in the surround sound receiver, make super low sound signal with around signal combination; (b) by the digital RF reflector wireless transmission composite signal related with the surround sound receiver; (c) use the wireless digital RF receiver related to receive the composite signal of wireless transmission with super woofer; (d) from composite signal, extract super low sound signal, utilize the super low sound signal that extracts to drive super woofer; And (e) provide around signal to the surround sound loud speaker that is connected with super woofer, utilize around the signal driving ring around boombox.
Description of drawings
By with reference to following description to one embodiment of the invention together with the accompanying drawing that is adopted, the above and other feature of the present invention and purpose will become more obvious together with the mode of obtaining them, and will understand invention itself better, wherein:
Fig. 1 is the block diagram of prior art arrangement of the routine of home theater or surround-sound system;
Fig. 2 is according to the principle of the invention, the home theater of demonstration or the block diagram of surround-sound system;
Fig. 3 is according to the block diagram of an embodiment of the home theater of the principle of the invention, Fig. 2 or surround-sound system;
Fig. 4 is according to the block diagram of another embodiment of the home theater of the principle of the invention, Fig. 2 or surround-sound system;
Fig. 5 is according to the block diagram of another embodiment of the home theater of the principle of the invention, Fig. 2 or surround-sound system;
Fig. 6 is all flow charts of the demonstration mode of operation of the present invention.
In whole accompanying drawing, corresponding Reference numeral is represented corresponding part.Although accompanying drawing has been represented embodiments of the invention, accompanying drawing needn't be drawn in proportion and make some feature may be by exaggerative for description and interpretation the present invention better.Here the example of being showed is illustrated one embodiment of the present of invention with a form, and can not think the restriction by any way scope of the present invention carried out to such example.
Embodiment
Embodiment disclosed herein is not for exhaustive or the present invention is defined in disclosed precise forms, so that others skilled in the art can utilize its instruction.
Fig. 2 describes be generally with 30 that represent, imbody the block diagram of household audio and video system of the principle of the invention.Household audio and video system 30 comprises first subsystem or the part that common usefulness is 32 that represent, can be called as main subsystem or part.Main subsystem 32 comprises home theater system 36, home theater system 36 is except having here according to described function of the principle of the invention and/or the operation, also play home theater system, for example comprise from one or more sources or input to reception, processing and/or the distribution (concentrated area processing) of the audio frequency or the audio/video signal of one or more destinations or parts in mode well known in the art.As audio process, receiver 36 provides audio signal to be used to produce audio frequency by suitable audio reproducing apparatus (as loud speaker).
Similarly, main subsystem 32 comprises right audio loud speaker (loud speaker) 38, left side audio tweeter (loud speaker) 40 and central audio tweeter (loud speaker) 42.Receiver 36 comprises right audio channel output or speaker port 37, and right channel audio signal is by being provided for right speaker 38 as the represented lead of line that extends between Fig. 2 middle port 37 and the loud speaker 38 from port 37.Receiver 36 also comprises L channel audio output or speaker port 39, and left channel audio signal is by being provided for left speaker 40 as the represented lead of line that extends between Fig. 2 middle port 39 and the loud speaker 40 from port 39.Receiver 36 also comprises center channel audio output or speaker port 41, and the center channel audio signal is by being provided for center loudspeaker 42 as the represented lead of line that extends between Fig. 2 middle port 41 and the loud speaker 42 from port 41.Main system 32 also comprises digital RF ejector system 50, will be described below this numeral RF ejector system 50 function, operation and/feature.Yet, be to be understood that: though digital RF reflector 50 as the part of receiver 36 or be incorporated in the receiver 36 and be shown, digital RF reflector 50 can be positioned at the outside of receiver 36 or be independent of receiver 36.
Household audio and video system 32 comprises that also general usefulness is 34 that represent, can be called as surround sound, around or strengthen second subsystem or the part of subwoofer subsystem or part.Around subsystem 34 comprise super woofer 44, right side surround sound (around) loud speaker 46 and left side surround sound (around) loud speaker 48.Super woofer comprise right surround sound (around) sound channel port 45, right surround sound (around) channel audio signal is by being provided for right side circulating loudspeaker 46 as the represented lead of line that extends between Fig. 2 middle port 45 and the loud speaker 46 from port 45.Right side and left side circulating loudspeaker also can be called as right side and left side rear speakers.Super woofer also comprise left surround sound (around) sound channel port 47, left surround sound (around) channel audio signal is by being provided for left side circulating loudspeaker 48 as the represented lead of the line that extends between Fig. 2 middle port 47 and the loud speaker 48 from port 47.XBS Extra Bass System 34 also comprises digital RF receiver system 52, will be described below this numeral RF receiver system 52 function, operation and/feature.Yet, be to be understood that: though digital RF receiver 52 is as the part of super woofer 44 or is incorporated in the super woofer 44 and is shown that digital RF receiver 52 can be positioned at the outside of super woofer 44 or be independent of super woofer 44.
Household audio and video system 30 shown in Figure 2 is called as 5.1 systems, because have five (5) loud speakers (right side and left speaker, center loudspeaker and right side and left side surround sound loud speaker) and (a 1) super woofer.Yet should understand: the present invention can be used for other speaker system configuration, as 7.1 systems (seven loud speakers and a super woofer).
Data according to Red Data Book CD form are grouped framing, and wherein each frame is made up of 588 channel bit.Each frame partly is made up of 27 bit synchronizations part, 8 SUBCODE parts (if being suitable for or necessity), 96 bit data part, 32 bit parity checks part, the 2 96 bit data part and the 2 32 bit parity check.When combined frames, six 32 pcm audio sampling periods are grouped forward one frame, and each sampling frame is cut apart then with this and produced four 8 audio frequency symbols.In order to disperse possible mistake, intersected so that the audio signal of a frame comes from different frame from the symbol of different frame.In addition, generate eight 8 bit parity check symbols, 4 middle part and 4 ends that are positioned at frame that are positioned at frame at each frame.The intersection of frame and the generation of parity-frame provide the error correction coding based on intersection interlacing reed-solomon (rs) code.In case made up framing, data will be encoded by EFM, and wherein 8 code character utilization the form that each 8 word distributed in 14 specific words is converted into the code character of 14 words.In one embodiment, the combination of frame (intersection and the EFM coding that comprise data) is carried out by CD form encoder, this CD form encoder has comprised CIRC encoder, control and display encoder, time multiplexing device and EFM modulator, and all these all are included in the digital RF reflector 50.Yet should recognize: above-mentioned functions can utilize other different parts well known by persons skilled in the art and software unit to realize with handling.Conversion produces the EFM signal, and this signal then is conditioned with this and produces modulation signal.
In addition, operand word RF reflector 50 as follows.In order to simplify follow-up frequency modulation(FM) step, make the frequency band of EFM signal be limited to sinusoidal fundamental wave by the Signal Regulation in the digital RF reflector 50, thus, the analoglike signal is sent to digital RF receiver 52 with this with audio frequency with frequent modulated carrier.The EFM signal can be that frequency band is limited to for example between the 180kHz to 720kHz.By comprising the digital RF reflector 50 of radiator or antenna, the EFM signal of adjusting is used to modulate the RF carrier signal.
Yet this scheme is only supported stereo.Therefore, the CD form can only be supported dual track.Under present situation, these two sound channels are right surround sound audio track and left surround sound audio track.Yet, according to the principle of theme invention, receiver 36 by and/or via digital RF reflector 50 LFE (low-frequency effect) sound channel (also being called the subwoofer sound channel) of surround-sound system is multiplexed in the right side and the left surround channel one or both.The digital RF reflector 50 of receiver 36 provides CD format combination audio frequency, XBS Extra Bass System or has strengthened the surround sound signal as mentioned above, and with its wireless digital RF receiver 52 that is sent to super woofer 44.In order from composite signal, to recover right surround sound audio track component, from composite signal, recover left surround sound audio track component and from composite signal, to recover subwoofer audio track (LFE) component, super woofer 44 be exercisable, can be configured to and/or be suitable for receive and the treatment combination audio signal.The right surround sound audio track that recovers is provided for right side circulating loudspeaker 46, and the left surround sound audio track of recovery is provided for left side circulating loudspeaker 48, and subwoofer (LFE) sound channel is provided for super woofer 44.Because super woofer 44 is located at the rear portion of home theater or surround-sound system usually, the user is connecting circulating loudspeaker 46 and will not have any problem at 48 o'clock with lead.
Referring to Fig. 3, demonstration be generally with 60 that represent, imbody the home theater of the principle of the invention or another example embodiment of surround-sound system, the part relevant especially above-mentioned with Fig. 2 embodiment.Similarly, household audio and video system 60 has first subsystem or the part that general usefulness is 62 that represent, can be called as main subsystem or part, and generally with 64 that represent, can be called as surround sound, around or strengthen subwoofer subsystem or second subsystem or part partly. Subsystem 62 and 64 each work according to the top principle that proposes.
Comprise around subsystem 64 and to have the right side around port 73 and left side super woofer 72 around port 75.Right side circulating loudspeaker 74 is described as by the lead of representing around the line between the port 73 with right side circulating loudspeaker 74 and right side and is connected to the right side around port 73, and left side circulating loudspeaker 76 be described as by the lead of representing around the line between the port 75 with left side circulating loudspeaker 76 and left side be connected to the left side around port 75.Super woofer 72 is connected to power supply or source 78, and power supply 78 is to super woofer 72 power supply, and super woofer 72 be again/powers to circulating loudspeaker 74,76.Super woofer 72 also comprises digital RF receiver 80, processor 82 and amplifier 84.
Particularly, with receiver 66 digital RF reflectors 70 related or that belong to receiver 66 parts be exercisable, can be configured to and/or be suitable for transmitting prerequisite for the modulation of use such as the audio frequency of the CD form of deferring to standard Red Data Book CD form.The processing that voice data is converted to Red Data Book CD form is known to one skilled in the art, and can utilize SAA 7392 IC that made by Philips company to realize.Voice data at first is converted into the PCM form, signal wherein by time sampling with become the parallel binary number by amplitude quantization.This process is finished in analog to digital converter (ADC) usually.Numerical data is processed then to provide CIRC error correction coding and 8-14 position modulation (EFM) with this.
Receiver 66 is multiplexed to LFE (low-frequency effect) sound channel (also being called the subwoofer sound channel) of surround-sound system among in right and the left surround channel one or both by processor 68 and via digital RF reflector 50.The digital RF reflector 70 of receiver 66 provides CD format combination audio frequency, XBS Extra Bass System or has strengthened the surround sound signal as mentioned above, and with its wireless digital RF receiver 80 that is sent to super woofer 72.
With reference now to Fig. 4,, description be generally with 90 that represent, according to the home theater of theme inventive principle or another embodiment of surround-sound system.The system 90 of Fig. 4 provides a kind of style of internal system, and this system is typical household audio and video system, and wherein the present invention or its principle can be implemented and provide a kind of implementation or method that LFE is multiplexed to surround channel.System 90 comprises main subsystem 92 and around/subwoofer subsystem 94.Main subsystem 92 comprise as critical piece around receiver 96, and comprise the super woofer 106 as its critical piece, digital RF receiver 114 and LFE extractor 116 around/subwoofer subsystem 94.In addition, for simplicity, there is not to show the loud speaker that is coupled with receiver 96.Right side circulating loudspeaker 108 and left side circulating loudspeaker 110 are connected to digital RF receiver 114, receive through digital RF receiver 114 with this and handle suitable surround channel afterwards.In addition, receiver 96 is connected to suitable power supply 98, and digital RF receiver 114 is connected to suitable power supply 112, and power supply 112 is powered as required.In general, this is 120 volts of AC power supplies, as the standard in the American family.The normally same power supply of power supply 98 and 112, but be access in by plugs different in the room.
Most of home theater systems (as receiver 96) comprise Digital Sound Processor 100.In addition, being provided with firmware 102 is used to make digital audio processor to work in the mode that is proposed here or moves.Digital Sound Processor 100/ firmware 102 allows to be used for bass management and/or the redirected configuration of bass.This allows LFE to be added on all or some loud speaker of other five loud speakers (in 5: 1 systems).This also allows the lower frequency components of audio track to be redirected to super woofer from loud speaker.Similarly, and according to principle of the present invention, digital audio processor 100 be used to left with the right side around digitally multiplexed LFE sound channel on the PCM sound channel.Firmware 102 is modified so that multiplexed LFE sound channel left and/or on the right surround channel, rather than or is multiplexed into the typical situation of the right side or L channel except LFE.In addition be possible because make the bass component of audio frequency be redirected to super woofer from five loud speakers, so that Sound Processor Unit 100 then adds the LFE signal with multiplexed this bass of surround channel also is possible.Digital multiplex can be finished by means of some options, for example LFE is added on list or the double surround track or LFE is added the bass frequencies audio component to add on list or the double surround track.Therefore, system 90 provides to be used to generate, provide and to receive combination LFE/ and has handled around the numeric field of signal.
Referring to Fig. 5, description be general another example embodiment with 130 home theaters of representing or surround-sound system, specifically in order to provide another kind with LFE audio component/signal and list or dicyclo mode around audio component/signal combination.System 130 comprises main subsystem 132 and subwoofer/around subsystem 134.With with the same or analogous mode of above-mentioned those subsystems, main subsystem 132 comprises the receiver 136 that has digital RF reflector 144.For simplicity, there is not to show yet display power supply not of the loud speaker link to each other with receiver 136.Subwoofer/comprise super woofer 146, right side circulating loudspeaker 148 and left side circulating loudspeaker 150 around subsystem 134.Power supply 152 is provided for super woofer 146.
In system 130, LFE is added with right and left surround channel one or both in analog domain, and the stereo channel to generation thus carries out digital coding for the digital delivery by digital RF reflector 144 then.Specifically, LFE, right surround channel and/or left surround channel are added in adder 138.Thereafter, the signal of total is provided for PCM140.The stereo digital pcm signal of Sheng Chenging then utilizes EFM modulator 142 to be encoded thus, is sent out on the RF carrier wave by reflector 144 then, and wireless signal is represented with curve.
In addition, utilize simple high pass filter also the LFE component can be removed from surround channel.Some occasion when the LFE signal will damage circulating loudspeaker (if), it may be favourable that the LFE component is removed.Other occasions (can control the occasion of LFE component or filter out the occasion of LFE component at circulating loudspeaker at circulating loudspeaker), high-pass filter LFE component may there is no need.
Referring to Fig. 6, description be general with flow chart 170 that represent, that describe the demonstration mode that the present invention operates.In step 172, subwoofer (as LFE) signal/sound channel and list or dicyclo are around signal/channel combinations.Can in receiver, realize this step by above-mentioned variety of way.In step 174, then by the digital RF reflector wireless transmission composite signal related with receiver.In step 176, composite signal is by the digital RF receiver wireless receiving related with super woofer.In step 178, super woofer extracts super low sound signal/sound channel from composite signal, utilizes super low sound signal/sound channel of extracting to drive super woofer.This extraction depends on signal/sound channel and how to be combined.At last, in step 180, be provided for one or two (being right side and/or the left side) circulating loudspeaker that links to each other with super woofer around signal/sound channel.
Should recognize: the above-mentioned flow process Figure 170 that is described in Fig. 6 provides a kind of demonstration mode of the invention of operating theme as described herein.Compare in steps with the institute among flow process Figure 170, utilize less or different steps can realize the theme invention.This point can reflect in the claims.In addition, in program, method or operate among 170 selected for use the embodiment, step more or less can realize the theme invention according to the principle of being quoted here.Equally, the subclass of said procedure 150 but not whole procedure can realize the principle of theme invention.Change is also among expection.
Though this invention is described by optimal design, the present invention also can be modified in the spirit and scope of this disclosure.Therefore, this application plan to comprise any utilize that its general principle carries out to change of the present invention, use, modification.In addition, this application plan to comprise as accessible in known in the art or common practical application, the present invention comprised and belong in the claims scope, to the change of this disclosure.
Claims (20)
1. wireless super woofer that is used for surround-sound system, described wireless super woofer comprises:
Receiver is used for that wireless receiving comprises subwoofer and around the signal of component; And
Extractor is used for extracting described subwoofer component from the signal of described reception and drives described super woofer with this;
Wherein said super woofer provides described to circulating loudspeaker and drives described circulating loudspeaker around component with this.
2. wireless super woofer as claimed in claim 1, wherein said receiver wireless receiving has the signal of subwoofer component, and described subwoofer component comprises the low-frequency effect component.
3. wireless super woofer as claimed in claim 1, wherein said receiver wireless receiving has the signal of bass frequencies audio component.
4. wireless super woofer as claimed in claim 1, wherein said extractor comprises low pass filter, be used to extract with from described received signal described around component by the described subwoofer component of digital multiplex.
5. wireless super woofer as claimed in claim 1, wherein said receiver wireless receiving comprises subwoofer and around the signal of component, described subwoofer and around component mutually by digital multiplex and utilize the modulation of 8-14 position to be encoded as predetermined format.
6. wireless super woofer as claimed in claim 1, wherein said receiver wireless receiving comprises subwoofer and around the signal of component, wherein said subwoofer component with described around component mutually adduction be converted into pcm format and utilize 8-14 position modulation to be encoded as predetermined format, and by the described 8-14 of demodulation position modulation signal with this derived pulse modulation signals, described extractor extracts described subwoofer component and drives described super woofer with this from described received signal, and converts the pulse code modulation signal of described derivation to the simulation super low sound signal and analog loop drives described super woofer and described circulating loudspeaker around signal respectively with this.
7. wireless super woofer as claimed in claim 6, wherein said extractor also comprises the low pass filter that is used to filter out described subwoofer component, and described super woofer also comprises and is used to amplify described simulation subwoofer and around the amplifier of signal.
8. surround sound receiver comprises:
First port is used to be connected to the first preposition loud speaker;
Second port is used to be connected to the second preposition loud speaker;
Combiner is used to make up the signal from subwoofer and surround channel; And
Reflector is used for the signal wireless of described combination is sent to super woofer;
The signal of the described combination of wherein said super woofer wireless receiving, from the signal of described combination, extract described subwoofer sound channel, the signal that comprises described surround channel is provided for the circulating loudspeaker power supply and to described circulating loudspeaker.
9. surround sound receiver as claimed in claim 8, wherein said combiner comprises:
Digital multiplexer is used for described subwoofer of digital multiplex and surround channel.
10. surround sound receiver as claimed in claim 8, wherein said combiner combination is from the signal of subwoofer and surround channel, and described subwoofer sound channel comprises the low-frequency effect component.
11. surround sound receiver as claimed in claim 8, the combination of wherein said combiner be from the signal of subwoofer and surround channel, and from the bass frequencies audio component of another sound channel.
12. surround sound receiver as claimed in claim 8, the combination of wherein said combiner be from the signal of subwoofer and surround channel, described subwoofer and surround channel are mutually by digital multiplex and utilize the modulation of 8-14 position to be encoded as predetermined format.
13. surround sound receiver as claimed in claim 8, wherein said combiner combination is from the signal of subwoofer and surround channel, and described subwoofer and surround channel have been added and have been converted into pcm format and utilized the modulation of 8-14 position to be encoded as predetermined format.
14. a driving has the method for the surround sound subsystem of super woofer and surround sound loud speaker, described method comprises the following step:
In the surround sound receiver with super low sound signal with around signal combination;
Signal by the digital RF reflector wireless transmission described combination related with described surround sound receiver;
Utilize the wireless digital RF receiver related to receive the composite signal of described wireless transmission with described super woofer; And
Provide described by described super woofer to the described surround sound loud speaker that links to each other with described super woofer, drive described surround sound loud speaker with described around signal with this around signal.
15. method as claimed in claim 14, wherein said combination step comprise the digital multiplex super low sound signal with around signal.
16. also comprising, method as claimed in claim 15, wherein said combination step utilize the modulation of 8-14 position that the conversion of signals of described digital multiplex is become predetermined format.
17. method as claimed in claim 15 also comprises and extract described super low sound signal drives described super woofer with this super low sound signal with described extraction step from the signal of described combination.
18. comprising from described, method as claimed in claim 17, wherein said extraction step go out described super low sound signal around filtering the signal.
19. method as claimed in claim 14, wherein said combination step comprises:
With analog format with described super low sound signal with described around signal plus;
Convert described added signal to pcm format; And
Utilize the described pcm format signal of 8-14 position modulating-coding.
20. method as claimed in claim 19, wherein said extraction step comprises:
Demodulation 8-14 position modulation signal obtains pulse code modulation signal with this; And
Convert described pulse code modulation signal to analogue audio frequency.
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| PCT/US2004/030949 WO2005032210A1 (en) | 2003-09-24 | 2004-09-22 | Wireless digital transmission of low frequency effects and surround channels for surround sound system |
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| CN1857030B true CN1857030B (en) | 2011-06-15 |
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| CN200480027259XA Active CN1857030B (en) | 2003-09-24 | 2004-09-22 | Method for driving surround sound system and wireless subwoofer loudspeaker |
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| EP (1) | EP1665877B1 (en) |
| JP (2) | JP4927543B2 (en) |
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| EP1665877B1 (en) | 2017-04-05 |
| US8340313B2 (en) | 2012-12-25 |
| CN1857030A (en) | 2006-11-01 |
| WO2005032210A1 (en) | 2005-04-07 |
| MXPA06003134A (en) | 2006-08-25 |
| JP2011211728A (en) | 2011-10-20 |
| JP4927543B2 (en) | 2012-05-09 |
| JP5158820B2 (en) | 2013-03-06 |
| KR101091045B1 (en) | 2011-12-09 |
| JP2007512722A (en) | 2007-05-17 |
| EP1665877A1 (en) | 2006-06-07 |
| KR20060126923A (en) | 2006-12-11 |
| US20080247554A1 (en) | 2008-10-09 |
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